Wrench



Aug; 14,1945. I A. c. LEIS'ENRING 2,382,074

WRENCH Filed Oct.- 4, 1943 V Patented Aug. 14, 1945 UNITED STATES PATENT"DFFICE WRENCH ArthurrC. Leisenring Denver, Colo. Application October 4,1943, Serial No. 504,973

1 Claim.

This invention relates to a socket wrench, and has for its principalobject the provision of a socket Wrench which can be used in exceedinglyclose quarters, where adjacent structures are so close to the wrenchfaces that an ordinary socket wrench can neither be inserted over thenut or bolt, nor rotated after insertion.

Other objects and advantages reside in the detail construction of theinvention, which is designed for simplicity, economy, and efliciency.

- These will become more apparent from the following description.

In the following detailed description of the invention reference is hadto the accompanying drawing which forms a art hereof. Like numeralsrefer to like parts in all views of the drawing and throughout thedescription.

In the drawing:

Figs. 1 to 4 inclusive, illustrate successive positions of the improvedsocket wrench while being used to rotate a typical bolt head.

Fig. 5 is an edge view of the improved wrench.

Fig. 6 is a vertical section, taken on the line 66, Fig. 1.

Fig. '7 is a-face view of a simplified form of the wrench; and

Fig. 8 is an edge view of the simplified form.

A typical bolt head has been indicated at 9 for illustrating the actionof the improved wrench.

The wrench consists of a wrench block In provided adjacent one extremitywith a round bolt head or nut receiving socket I I for the reception ofthe bolt head 9, and adjacent the other extremity with a wrench socketI2 of any suitable shape, other than round, for the reception of astandard socket wrench bar. A boss [9 is formed on the latter extremitycontaining a threaded socket 20 for the attachment of a suitable handleif desired. Two dog pockets I3 are formed adjacent to the bolt socket Hand both open to the latter. Ratchet dogs l4 and I5 are mounted in thetwo sockets ll, upon suitable shanks I! which slide in guide holes 2|.The shanks l1 are threaded into the dogs. A suitable screw driver slotbeing provided as illustrated. Compression springs l6 positioned aboutthe shanks of the dogs I 4 and [5 act to continually urge the dogsagainst the end walls of the pockets I3.

It will be noted that the two dogs l4 and I5 move on axes at rightangles to each other, and, when in their fully extended position, thetop faces of the dogs will be positioned at right angles to each otheron planes intersecting the may be used to rotate it one face distance.

axis of the bolt 9. For convenience in describing the operation of theimproved wrench, a radial line A has been extended from the bolt [9 toshow the relative positions of the latter.

It will be noted that in Fig. l, the dog I5 is engaging one of the facesof the bolt head l9 so that when the wrench is rotated in the directionof the arrow in this figure, the bolt l9 will be rotated to the positionof Fig. 2.

The direction of the rotation of the wrench is now reversed as shown bythe arrow in Fig. 2, until the second dog [4 snaps past the projectingcorner between two Wrench faces, and assumes the position of Fig. 3.. Ifthe wrench be now rotated as shown by the arrow in Fig. 3, the bolt I9will be again rotated to the position of Fig. 4. The direction ofrotation is again reversed, as shown by the arrow in Fig. 4, until thefirst dog I 5 snaps past the adjacent corner of the bolt head, and againassumes the position of Fig. l.

The corner edge of both dogs where they contact the bolt head areslightly rounded, as shown at I 8, to facilitate the passage of the dogsover the bolt head corners on the reverse movement.

It will be noted that, although the bolt has only six wrench faces, twostrokes of the wrench In other words twelve strokes (of 30) can be usedfor each complete rotation of a. hexagonal bolt or nut so that thelatter can be rotated in very restricted positions. It is desired tocall attention to the very thin wall surrounding the bolt socket II onthe side opposite the dogs l4 and I5. This enables the wrench to beslipped over bolts, nuts or screws such as the cylinder base screws ofaircraft engines where the adjacent wall is very close to the screwheads.

In Figs. 7 and 8, a simplified form of the wrench is illustratedconsisting of a wrench block 22 provided at one extremity with a roundbolt socket 23, and at its other extremity with handle sockets 24 and25. In this form only a single dog 21 is provided mounted on a guideshank 28, and actuated by a compression spring 29 similar to thepreviously described form. The guide stud 28 slides within a guide hole30. The dog 21 is formed with a rounded corner 3| to facilitate itspassage over the bolt corners on the reverse movement. This form of thewrench operates exactly as the previous form, except that only sixstrokes can be obtained per revolution on a hexagonal head in place ofthe twelve strokes of the previous form.

It will be noted that when a dog is engaged in rotating a bolt or nutthe reactive thrust thereof been described and illustrated herein, it isde- 5 sired to be understood that the .same may be varied, withinthe'scope of the appended claim, without departing from the spirit ofthe invention.

axis of said nut receiving opening, there being a guide hole extendingthrough the rearward end Wall of said pocket to the exterior edge ofsaid block; a square dog slidably mounted in said pocket with one of itssides engageable with said for-ward end wall and having a rounded cornerportion and a side extending into said nut receiving opening to engagethe nut, the width of said dog being equal to the thickness of said av gthus described the invention, what is 10 bloc]; so that its sides willalign with the sides of claimed andfde'siredsecured by Letters Patntis:

A wrench comprising: a wrench block provided with a rounded nutreceiving opening extending through said block; a rectangular dog pocket-"said"block;"-- a spring urging the front face of said dog againstsaid" end wall of'said pocket; and a slidable guide shank inserted fromthe exterior or said vblock through said guide hole and through openingto said receiving opening and also "ex-' i ls 'said spring to a threadedconectiou with the rear tending entirely through said block soas to, beopen at both sides thereof, said pocket having-a forward end wall lyingin aplane radial 'to the 7 face of said dog to prevent the latter fromfalling"th'rou'gh"t'he open sides of said pocket.

' C. LEISENRING.

